Prospects of ion-mobility measurements in superheavy element research
Department für Physik, Ludwig-Maximilians-Universität München, 85748 Garching, Germany
Corresponding author: a firstname.lastname@example.org
Revised: 29 March 2007
Published online: 1 June 2007
The element specific electron configuration of ions directly reflects the two quantum mechanical observables 〈r2〉 and rmax, which denote the r2 expectation value of the electron density and the principle maximum of the wave function of the outermost electron orbital, respectively. Thus, the determination of these observables may present a new access to element identification of single superheavy nuclides. In this paper, we discuss how these observables are related to ionic radii deduced from ion-mobility data using the most simple hard sphere model and semi-empirical (n,6,4) model potentials for the interaction of heavy ions with noble gases. A concept for a high resolution ion-mobility spectrometer is presented. Optimum extraction efficiency of the ions will be achieved by decoupling the ion motion from the electric field drift by the friction force of the suitably shaped gas flow at the exit nozzle.
PACS: 27.90.+b – Properties of superheavy elements / 31.10.+z – Theory of electronic structure, electronic transitions, and chemical binding / 51.10.+y – Kinetics and transport theory of gases / 52.20.Hv – Atomic, molecular, ion, and heavy-particle collisions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007